Climatological Report (Daily)
Issued by NWS Upton, NY

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790
CDUS41 KOKX 152038
CLIISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
438 PM EDT TUE SEP 15 2026

...................................

...THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 15 2026...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1963 TO 2026


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         71    215 PM  84    2008  75     -4       82
  MINIMUM         52    518 AM  40    1975  59     -7       63
  AVERAGE         62                        67     -5       73

PRECIPITATION (IN)
  TODAY            0.00          3.12 1966   0.12  -0.12     0.00
  MONTH TO DATE    4.21                      1.72   2.49     1.24
  SINCE SEP 1      4.21                      1.72   2.49     1.24
  SINCE JAN 1     35.84                     32.02   3.82    25.02

SNOWFALL (IN)
  TODAY            0.0          MM      MM   0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.0    0.0      0.0
  SINCE SEP 1      0.0                       0.0    0.0      0.0
  SINCE JUL 1      0.0                       0.0    0.0      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY            3                         1      2        0
  MONTH TO DATE    3                         8     -5        2
  SINCE SEP 1      3                         8     -5        2
  SINCE JUL 1      3                        11     -8        2

 COOLING
  TODAY            0                         4     -4        8
  MONTH TO DATE   92                        75     17       58
  SINCE SEP 1     92                        75     17       58
  SINCE JAN 1    965                       839    126      986
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION    NE (60)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     E (70)
  AVERAGE WIND SPEED     5.5


SKY COVER
  AVERAGE SKY COVER 0.2


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83           600 AM
 LOWEST     45          1200 PM
 AVERAGE    64

..........................................................


THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   75        88      1998
 MINIMUM TEMPERATURE (F)   59        44      1964


SUNRISE AND SUNSET
SEPTEMBER 15 2026.....SUNRISE   633 AM EDT   SUNSET   701 PM EDT
SEPTEMBER 16 2026.....SUNRISE   634 AM EDT   SUNSET   700 PM EDT


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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